Commissariat a L'energie Atomique

Annie Ruaudel

Andre Barraud

Michel Vandevyver

Serge Palacin

Jean Messier

Jean Leloup

Florence Porteu

The invention relates to bidimensional organic membranes or diaphragms and to their preparation processes. These diaphragms have at least one monomolecular layer of organic molecules A, such as porphyrins, phthalocyanines and porphyrazines. In a layer, each molecule A is directly or indirectly bonded to n (n.gtoreq.3) identical molecules A by n bonds arranged symmetrically with respect to the center of the molecule A. Therefore there diaphragms have microscopic physical properties identical in at least two directions of the plane of the diaphragm. They can be used as conductive diaphragms.

Bidimensional organic diaphragms and their preparation processes

Electrically-conducting films comprising at least one monomolecular layer of an organic charge transfer complex and their production process. These films comprise at least one monomolecular layer of an organic charge transfer complex having at least one electron acceptor group and at least one electron donor group, the electron acceptor and/or donor group having at least one hydrocarbon chain with 16 to 30 carbon atoms and the electron acceptor and/or donor groups being organized in such a way that two adjacent groups of the same type, namely electron donors or electron acceptors, can be sufficiently coupled in the plane of the layer to exchange an electron and ensure an electrical conduction in said plane. The charge transfer complex can be an alkyl pyridinium-tetracyanoquinodimethane.

Electrically conducting films comprising at least one monomolecular

Process for producing a film having at least one monomolecular layer of non-amphiphilic molecules. This process comprises the following stages:

Process for producing a thin film having at least one monomolecular

The material comprises a membrane constituted either by at least one monomolecular layer of amphiphilic molecules, or by amphiphilic molecules adsorbed on a substrate, and microaggregates of the metal, inorganic compound or organometallic compound retained on or in the membrane. It is prepared from a membrane containing a metal ion or a precursor compound of said metal, inorganic compound or organometallic compound, by reacting the ion or precursor compound fixed in the membrane with at least one reagent for forming the metal, inorganic compound or organometallic compound in situ in the membrane. For example, the membrane can be constituted by monomolecular layers of behenic acid, which is then converted into silver behenate by contacting with a silver nitrate solution. Silver microaggregates are then formed in the membrane by reducing the silver behenate by means of hydrazine.

Material containing microaggregates of metals, inorganic compounds or

Photosensitive film which can be used in microgravure, wherein it comprises at least one organic monomolecular layer having amphiphilic molecules with at least one irradiation polymerizable function and one aliphatic chain with at least 12 carbon atoms, a polymerizable function being located at the hydrophobic end of said molecules. The photosensitive films can be used with particular advantage in the production of microetched objects, such as optical and holographic systems, integrated optical devices and electronic microcircuits.

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Verrieres le Buisson, France

Annie Ruaudel